Critical reading involves analyzing a text beyond just understanding it at a surface level. It requires asking questions about the strengths and weaknesses of arguments presented in the text. Some key aspects of critical reading include determining an author's purpose and viewpoint, separating facts from opinions, evaluating logic and evidence, and deciding whether to accept or reject the information. To be a critical reader, one should reflect carefully on what a text says, describes, and means by asking questions about the author's qualifications, potential biases, and missing information. Taking notes, marking up the text, and reading slowly and openly are important practices for developing critical reading abilities.